Multiplication property of equality can be used to solve: 
Step-by-step explanation:
First of all, lets define the multiplication property of equality
The multiplication property of equality states that if one side of an equation is multiplied with any number the other side is also multiplied with the number.
Given equations are:

By observing the equations we can see that only third equation has a fraction in it so it has to be multiplied with -2 for solution

Hence,
Multiplication property of equality can be used to solve: 
Keywords: Linear equation, properties
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The subtraction property of inequality can be used to proof that x = 7 from x + 8 = 15
<h3>What is an
equation?</h3>
An equation is an expression that shows the relationship between two or more variables and numbers.
Given that x + 8 = 15
Hence:
x + 8 - 8 = 15 - 8 (subtraction property of inequality)
x = 7
The subtraction property of inequality can be used to proof that x = 7 from x + 8 = 15
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Answer:
9÷x is the correct answer
When converted to a household measurement, 9 kilograms is approximately equal to a
slope=0
it's a straight horizontal line when you graph it.